The code I am running returns an error message "index exceeds matrix dimensions" and I can't figure out where this issue is located. Ideas?
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I am trying to track and label cars, buses and pedestrians in a minute pre-recorded video using motion detection and the kalman filter. The goal will be to eventually label them as they pass and keep count of which kind did.
Here is the Code: ---
% It returns a message "index exceeds matrix dimensions"
video = VideoReader('clip1-quicktime.mov'); %in place of aviread
%nframes = length(video);
nframes=video.NumberOfFrames;
for i=1:nframes
mov(i).cdata=read(video,i)
%creating '.cdata' field
end
temp = zeros(size(mov(1).cdata));%Removed 1 and added i
[M,N] = size(temp(:,:,1));
for i = 1:10
temp = double(mov(i).cdata) + temp;
end
imbkg = temp/10;centroidx = zeros(nframes,1);
centroidy = zeros(nframes,1);
predicted = zeros(nframes,4);
actual = zeros(nframes,4);
R=[[0.2845,0.0045]',[0.0045,0.0455]'];
H=[[1,0]',[0,1]',[0,0]',[0,0]'];
Q=0.01*eye(4);
P = 100*eye(4);
dt=1;
A=[[1,0,0,0]',[0,1,0,0]',[dt,0,1,0]',[0,dt,0,1]'];
kfinit = 0;
th = 38;
for i=1:nframes
imshow(mov(i).cdata);
hold on
imcurrent = double(mov(i).cdata);
diffimg = zeros(M,N);
diffimg = (abs(imcurrent(:,:,1)-imbkg(:,:,1))>th) ...
| (abs(imcurrent(:,:,2)-imbkg(:,:,2))>th) ...
| (abs(imcurrent(:,:,3)-imbkg(:,:,3))>th);
labelimg = bwlabel(diffimg,4);
markimg = regionprops(labelimg,['basic']);
[MM,NN] = size(markimg);
for nn = 1:MM
if markimg(nn).Area > markimg(1).Area
tmp = markimg(1);
markimg(1)= markimg(nn);
markimg(nn)= tmp;
end
end
bb = markimg(1).BoundingBox;
xcorner = bb(1);
ycorner = bb(2);
xwidth = bb(3);
ywidth = bb(4);
cc = markimg(1).Centroid;
centroidx(i)= cc(1);
centroidy(i)= cc(2);
hold on
rectangle('Position',[xcorner ycorner xwidth ywidth],'EdgeColor','b');
hold on
plot(centroidx(i),centroidy(i), 'bx');
kalmanx = centroidx(i)- xcorner;
kalmany = centroidy(i)- ycorner;
if kfinit == 0
predicted =[centroidx(i),centroidy(i),0,0]' ;
else
predicted = A*actual(i-1,:)';
end
kfinit = 1;
Ppre = A*P*A' + Q;
K = Ppre*H'/(H*Ppre*H'+R);
actual(i,:) = (predicted + K*([centroidx(i),centroidy(i)]' - H*predicted))';
P = (eye(4)-K*H)*Ppre;
hold on
rectangle('Position',[(actual(i,1)-kalmanx)...
(actual(i,2)-kalmany) xwidth ywidth],'EdgeColor','r','LineWidth',1.5);
hold on
plot(actual(i,1),actual(i,2), 'rx','LineWidth',1.5);
drawnow;
end
3 comentarios
Walter Roberson
el 16 de Feb. de 2016
Put the code into a .m file. At the command line, give the command
dbstop if error
Now run the code. An error message will be produced and it will show you which line is giving the difficulty. Give the command
dbstack
and show us the output.
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